Re: SLUB: Return ZERO_SIZE_PTR for kmalloc(0)

[Pekka Enberg]

On 6/4/07, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> Well, the red-zones won't catch readers, and more importantly, even for
> writers they are *really* inconvenient, because it will just tell you
> something bad happened, it won't tell you *where* it happened.

True.

On 6/4/07, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> Since comparing the addresses of two zero-sized allocations is insane and
> not done _anyway_, it's just much better to return an invalid address.

Then we might as well return your regular NULL pointer for zero-length
allocations as you can't do anything sane with ZERO_SIZE_PTR either.
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